backlight: aat2870-backlight: Remove struct backlight.check_fb

The driver's implementation of check_fb always returns true, which
is the default if no implementation has been set. So remove the code
from the driver.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
Link: https://lore.kernel.org/r/20240305162425.23845-6-tzimmermann@suse.deSigned-off-by: Lee Jones <lee@kernel.org>

drivers/video/backlight/aat2870_bl.c

@@ -12,7 +12,6 @@
 #include <linux/platform_device.h>
 #include <linux/mutex.h>
 #include <linux/delay.h>
-#include <linux/fb.h>
 #include <linux/backlight.h>
 #include <linux/mfd/aat2870.h>
 
@@ -90,15 +89,9 @@ static int aat2870_bl_update_status(struct backlight_device *bd)
 	return 0;
 }
 
-static int aat2870_bl_check_fb(struct backlight_device *bd, struct fb_info *fi)
-{
-	return 1;
-}
-
 static const struct backlight_ops aat2870_bl_ops = {
 	.options = BL_CORE_SUSPENDRESUME,
 	.update_status = aat2870_bl_update_status,
-	.check_fb = aat2870_bl_check_fb,
 };
 
 static int aat2870_bl_probe(struct platform_device *pdev)